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      11-08-2019, 11:45 AM   #1
NRigs
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Meth Nozzle Size

Running MHD Stage 2+ with 50/50 boost juice going through a single nozzle in my charge pipe. I currently have a D07 (640 ml/min) nozzle and I feel like that is too much for what I have. Would I be better off with a D03 (370 ml/min) or D05 (520 ml/min) nozzle?
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      11-08-2019, 01:11 PM   #2
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What controller do you use?
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      11-08-2019, 01:23 PM   #3
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Quote:
Originally Posted by NRigs View Post
Running MHD Stage 2+ with 50/50 boost juice going through a single nozzle in my charge pipe. I currently have a D07 (640 ml/min) nozzle and I feel like that is too much for what I have. Would I be better off with a D03 (370 ml/min) or D05 (520 ml/min) nozzle?
Why? What are you basing that off of? Are you running a custom tune setup around meth, or standard tune not setup for meth?

What are your AFR's doing when the meth is spraying?

Just trying to get some more info......
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      11-08-2019, 02:48 PM   #4
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Quote:
Originally Posted by Supermoon View Post
What controller do you use?
AEM V2

Quote:
Originally Posted by iqraceworks View Post
Why? What are you basing that off of? Are you running a custom tune setup around meth, or standard tune not setup for meth?

What are your AFR's doing when the meth is spraying?

Just trying to get some more info......
Getting some high timing corrections while it is spraying. I am using the standard tune not setup for meth. My AFRs are fairly normal under WOT @ 12.3ish.
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      11-08-2019, 02:50 PM   #5
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Quote:
Originally Posted by NRigs View Post
Getting some high timing corrections while it is spraying.
Can you share logs?
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      11-08-2019, 03:00 PM   #6
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Quote:
Originally Posted by Supermoon View Post
Can you share logs?
I feel like I have other issues as well. The way I have it set up is wrong. TMAP is not in direct path of charge pipe air / meth because of the boost adapter. Planning on taking out the boost adapter that is between the TMAP and charge pipe so the TMAP can sit back in the charge pipe. I am going to tap the boost from the second meth bung. It has been throwing off my real IAT readings (IAT reading double the ambient temp) since the boost adapter is acting like a heat sink. I also believe that meth is pooling up inside the boost adapter where the TMAP is sitting and messing with how it is reading the boost. (I had meth coming out of the boost line going into my AEM controller.) I have been trying to stay out of boost so the meth isn't triggering. various logs in 3rd and 4th gear are below.

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/meth-test...22-23-24-25-26

https://datazap.me/u/nrigs/tedtest?l...22-23-24-25-26
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      11-08-2019, 03:06 PM   #7
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Quote:
Originally Posted by NRigs View Post
AEM V2



Getting some high timing corrections while it is spraying. I am using the standard tune not setup for meth. My AFRs are fairly normal under WOT @ 12.3ish.
If you are getting lots of timing corrections....doesn't that mean that you aren't spraying enough meth? Why do you think you are spraying too much?
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      11-08-2019, 03:29 PM   #8
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Quote:
Originally Posted by Supermoon View Post
That makes sense but at what rpm/boost did you set to it start spraying?
Also, try 100% meth if you don't mind. It might solve your problem.
I am using boost juice. I have tried between 7 psi and 10 psi and go max at 14 psi. I had one good log where it hit 18 psi at lower rpm and at 5500 rpm it was at 15.5 or 14.5 psi.
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      11-09-2019, 02:39 PM   #9
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Quote:
Originally Posted by iqraceworks View Post
If you are getting lots of timing corrections....doesn't that mean that you aren't spraying enough meth? Why do you think you are spraying too much?
If the corrections were later in the log then yes it would indicate that there isn't enough octane. If it were right when methanol started spraying then it could indicate too much volume or poor atomization.
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      11-11-2019, 03:28 PM   #10
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I believe the volume and octane are too high which is causing it to run rich. My stfts start at 0 then drop to over -20% which would indicate that it is too rich. I may go the custom tune route to smooth out the STFTs and hopefully in return it will correct my timing issues.
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      11-11-2019, 06:52 PM   #11
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Quote:
Originally Posted by NRigs View Post
I believe the volume and octane are too high which is causing it to run rich. My stfts start at 0 then drop to over -20% which would indicate that it is too rich. I may go the custom tune route to smooth out the STFTs and hopefully in return it will correct my timing issues.
What are your AFR's throughout the run?
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      11-11-2019, 08:38 PM   #12
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Quote:
Originally Posted by NRigs View Post
I believe the volume and octane are too high which is causing it to run rich. My stfts start at 0 then drop to over -20% which would indicate that it is too rich. I may go the custom tune route to smooth out the STFTs and hopefully in return it will correct my timing issues.
Octane has no impact on AFR. Running a CM10 which is 940cc/m @ 100psi (I run a 200 psi pump) My AFR was very close to the same as without it. It either didn't make a noticeable difference in volume or the DME compensated and removed some fuel.
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      Yesterday, 08:51 AM   #13
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Quote:
Originally Posted by iqraceworks View Post
What are your AFR's throughout the run?
mid 12s
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      Yesterday, 05:01 PM   #14
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Quote:
Originally Posted by NRigs View Post
mid 12s
That doesn't sound too rich.....that sounds perfect. If it was down under 11:1, I would say it's starting to get a little fat......low 10's....and it's getting pretty rich.
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      Yesterday, 05:11 PM   #15
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Quote:
Originally Posted by NRigs View Post
Running MHD Stage 2+ with 50/50 boost juice going through a single nozzle in my charge pipe. I currently have a D07 (640 ml/min) nozzle and I feel like that is too much for what I have. Would I be better off with a D03 (370 ml/min) or D05 (520 ml/min) nozzle?
On the contrary, you may want to go the other direction, consider a DO10. 10 is the standard nozzle size for most methanol kits on this platform with your modifications.

You can also try going to a higher concentration of methanol to see if timing corrections get better.

You should be 100% spray by 10 PSI.

Quote:
Originally Posted by NRigs View Post
I feel like I have other issues as well. The way I have it set up is wrong. TMAP is not in direct path of charge pipe air / meth because of the boost adapter. Planning on taking out the boost adapter that is between the TMAP and charge pipe so the TMAP can sit back in the charge pipe. I am going to tap the boost from the second meth bung. It has been throwing off my real IAT readings (IAT reading double the ambient temp) since the boost adapter is acting like a heat sink. I also believe that meth is pooling up inside the boost adapter where the TMAP is sitting and messing with how it is reading the boost. (I had meth coming out of the boost line going into my AEM controller.) I have been trying to stay out of boost so the meth isn't triggering. various logs in 3rd and 4th gear are below.

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/5050-stag...21-22-23-24-25

https://datazap.me/u/nrigs/meth-test...22-23-24-25-26

https://datazap.me/u/nrigs/tedtest?l...22-23-24-25-26
You'll want to tap for the boost reading at the intake manifold. Before the throttle body is not ideal as it can be too turbulent or just inaccurate, especially if using adapters and such.

Also what kind of charge pipe and where are the methanol bungs?
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      Today, 10:50 AM   #16
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Quote:
Originally Posted by Jeff@TopGearSolutions View Post

You can also try going to a higher concentration of methanol to see if timing corrections get better.

You'll want to tap for the boost reading at the intake manifold. Before the throttle body is not ideal as it can be too turbulent or just inaccurate, especially if using adapters and such.

Also what kind of charge pipe and where are the methanol bungs?
I am using the 50/50 boost juice and don't want to add any more meth. I am also working on a custom tune now and the corrections were 100% related to the OTS tune. My corrections are minimal now.

I recently removed the boost adapter installed at the TMAP (to put the TMAP back in the direct path of the charge air / meth spray) and added a 90 vacuum line fitting at my second meth bung on my VRSF charge pipe to tap the boost. The bungs are 180 from each other. The dinan boost adapter is too large to fit at the manifold MAP sensor location. I don't think I would be able to put the cowling back on.
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